{ config, lib, pkgs, ... }: { environment = { systemPackages = with pkgs; [ libsForQt5.qtstyleplugins # qt5.qtbase # make Qt 5 apps inherit GTK2 theme ]; sessionVariables = { QT_QPA_PLATFORMTHEME = "gtk2"; GTK_DATA_PREFIX = [ "${config.system.path}" ]; GTK2_RC_FILES = "$HOME/.config/gtk-2.0/gtkrc"; }; }; services.xserver.displayManager.sessionCommands = '' source "$XDG_CONFIG_HOME"/xsession/*.sh xrdb -merge "$XDG_CONFIG_HOME"/xtheme/* ''; }